diff --git a/install.sh b/install.sh
index 3fc0cd4..372acb5 100755
--- a/install.sh
+++ b/install.sh
@@ -74,14 +74,16 @@ copyManpage()
 response=$( echo "$@" | grep -Eo "\-\-prefix")
 
 if [[ $response == "--prefix" ]]; then
-  prefix=$(echo -n "$@" | sed -e 's/--prefix=\(.*\) .*/\1/')
+  prefix=$(echo -n "$@" | sed -e 's/--prefix=\(.*\) .*/\1/' | grep -Eo "^[a-z/A-Z=]*")
   mkdir -p $prefix/bin $prefix/share/man/man1
   if [[ $2 == "all" ]];then
     for tool in "${tools[@]}"; do
       singleInstall $tool || exit 1
     done
   else
-    singleInstall $2 || exit 1
+    for tool in "${@:2}"; do
+      singleInstall $tool || exit 1
+    done
   fi
   copyManpage || exit 1
 elif [[ $# == 0 ]]; then